Komatsu WA150-5 Parking Brake System Manual

Product Overview

This guide provides detailed instructions for the operation and maintenance of the parking brake system for the Komatsu WA150-5. From understanding the basic functions to troubleshooting, this manual serves as a comprehensive resource for users.

Table of Contents

• General
• Structure and Functions
• Testing and Adjusting
• Disassembly and Assembly
• Maintenance Standard
• Others

Manual Extract: Operation of Parking Brake Lever

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• Free Position:
  • When the brake is released, both the intermediate and bottom switches are closed.
  • The parking brake pilot lamp turns off.
  • The brake reminder lamp activates, and the alarm sounds only when the engine is off.
  • The HST controller power hold relay ensures the motor and clutch solenoids remain engaged, preventing unwanted movement on slopes.
• Mid Position:
  • Pulling the lever slightly opens the bottom switch while keeping the parking brake relay contacts closed.
  • The pilot lamp and caution lamp behave similarly to the Free position.
  • The parking brake remains disengaged.
• Lock Position:
  • Fully pulling the lever opens the intermediate switch, cutting off current to the relay coil.
  • The contacts open, deactivating the parking brake pilot lamp relay.
  • This cuts power to the drag prevention relay, disabling forward-reverse movement even if controls are engaged.
  • The pilot lamp lights up only when the starting switch is on, irrespective of the reminder lamp.
  • The parking brake is fully applied.

Key Features

• Comprehensive coverage of brake system operations.
• Includes diagrams and troubleshooting steps.
• User-friendly layout for easy navigation.

Benefits

• Ensures safe vehicle operation with an effective brake system.
• Prevents accidental vehicle movement.
• Provides step-by-step guidance for maintenance and repair.

Usage Recommendations

• Refer to this guide for routine checks and adjustments.
• Use for troubleshooting brake system issues.
• Follow prescribed maintenance intervals for longevity.